Being stuck indoors for a prolonged period of time during the winter months and suffering from depression caused from a vitamin deficiency caused by a lack of sunlight and sick of being inside with the same people for months on end.

I have cabin fever so bad from being stuck inside the house with my stupid brothers and sisters all winter long!

According the movie, "The Shining",
Stuart Ullman calls cabin fever "a kind of claustrophobic reaction which can occur when people are shut in together over long periods of time."

But at some point during the winter, he must have suffered some kind of a complete mental breakdown. He ran amuck, and uh, killed his family with an axe. Stacked 'em neatly in one of the rooms of the West Wing, and uh, then he, uh, he put, uh, both barrels of a shotgun in his mouth. Police, uh, they thought that was what the old-timers used to call cabin fever.

When one spends too much time in a particular institution and hinds themselves sexually attracted to a person who they otherwise would not be inclined to sleep with. These institutions range from a school to a workplace or community group.

1. "Wow, I've spent so much time in this all-boys school that I feel like having sex with Fred."

"Dude, you've got cabin fever."

or

"Wow, I'm really finding the special needs teacher attractive"

"Please. In the rest of the world she would rate very poorly. Your cabin fever's distorting your ability to judge."

2. "Wow, I've been in this office for a comparatively long period of time and really feel like sleeping with Gladys from Human Resources."

"Snap out of it! Its all just cabin fever. Let's hit up a tittie club."